Yamaha Fz6 N Service Manual

ABS (ANTI-LOCK BRAKE SYSTEM)
8-88
Malfunc-
tion code Problem Check point Reference
11* Front wheel sensor signal is not 
received properly.
 Installation of the front wheel 
sensor
 Front wheel sensor lead and cou- pler
 ABS wire harness circuit
 Front wheel sensor rotor Malfunction 
code 11
12 Rear wheel sensor signal is not 
received properly.
 Installation of the rear wheel sen-
sor
 Rear wheel sensor lead and cou-
pler
 ABS wire harness circuit
 Rear wheel sensor rotor Malfunction 
code 12...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-89
25At the beginning of running, there 
is no pulse from the front wheel 
sensor.
 Rear wheel was rotated with the 
vehicle on the centerstand.
 Rear wheel was wheel-spin.
 Wheelie tried
 Defective installation of the wheel  speed sensor for the front wheel Malfunction 
code 25
26 (front) 27 (rear) Same as malfunction code 13 and 
14
(Running on extremely uneven 
roads)
 Same as malfunction code 13 
and 14 Malfunction 
code 26 
(front) and 27 
(rear)
28 Other...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-90
35Disconnection is detected between 
the ABS ECU and solenoid sys-
tem.
Downstream side of the solenoid 
relay  ABS harness circuit (from ABS 
ECU to the solenoid)
 Solenoid coupler
 Battery terminal is disconnected. Malfunction 
code 35
41 Front wheel will not recover from 
the locking tendency even though 
the signal is continuously transmit-
ted from the ABS ECU to release 
the hydraulic state (when the bat-
tery voltage is normal).  Brake dragging
 Hydraulic...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-91
* Malfunction code 11 is indicated if the rear wheel rotates for more than 20 seconds with the front
wheel stopped.
NOTE:
Malfunction code 15 (front wheel sensor) or 16 (rear  wheel sensor) is displayed if a defective con-
nection to either the front or rear sensor is detected whether or not the vehicle is ridden.
Malfunction code 11 (Front wheel sensor signal is not received properly.)
Turn the main switch to “OFF”, then back to “ON” after removing the test coupler...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-92
2. ABS warning light goes on for 2 seconds then goes off.1. With the rear wheel stopped, the front wheel was rotated at a speed faster than 11 km/h. This 
is not a malfunction.
2. Signal is not generated at the rear wheel sensor.  Rear wheel sensor is not installed properly.  → [D-4]
 Rear wheel sensor rotor is defective.  → [D-4]
3. Rear wheel sensor circuit is short-circuited.  Rear sensor or lead  is short-circuited. → [D-4]
 Wire harness (ABS) sensor circuit is...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-93
2. Check the appearance.
3. Check the wire harness.1. Disconnection of the ABS ECU coupler terminal
2. Remove the ABS ECU coupler an d wheel sensor coupler and check the conductivity, short-
circuit to GND and short- circuit to SSR-VCC from the wire harness.
 Conductivity of the wire harness Check the conductivity between “A”–“B”, and “C”–“D”.
 GND short-circuit
Check the short-circuit to GND between “A”–“B”, and “C”–“D”.
 Short-circuit between the wire harnesses...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-94
*Continuity between: “A”–“B”, “A”–“C”, “D”–“G”\
, “E”–“F”
 Check the insulation of the hydraulic unit solenoid circuits and the negative battery terminal.
4. Battery
 Battery terminal is disconnected
Malfunction code 22 (Starter motor monitor malfunction)
1. Disconnection of the wire harnes s for the start system circuit
→  Check the conductivity of the wire harnes s and repair or replace the failure part.
2. Disconnection of the starter motor monitor
→ Check the...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-95
*Continuity between: “A”–“B”
Malfunction code 25 (At the beginning of running, there is no pulse from the front wheel sen-
sor.)
 Rear wheel was rotated with the vehicle on the stand.
 Rear wheel was wheel-spin.
 Wheel tried.
 Defective installation of the whee l speed sensor for the front wheel.
Malfunction code 28 (Other malfunctions [Malfunction of the memory in ABS ECU].)
1 Other malfunctions →  Replace the ABS ECU.
Malfunction code 31 (Disconnection is detected...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-96
*Continuity between: “A”–“C”, “B”–“C”
3. When the items 1 to 2 are normal, replace the ABS ECU.
Malfunction code 33 (Defective operation of  the ABS motor is detected. [ABS motor stops
and will not rotate.])
NOTE:
Check following the steps in sequence.
1. ABS motor fuse  Check if the ABS motor fuse beside the battery is blown.
2. ABS motor relay  Check if the ABS motor relay operates correctly.  → [D-2] 
3. Wire harness  Remove the ABS motor relay and the ABS motor...

ABS (ANTI-LOCK BRAKE SYSTEM)
8-97
 Check if the ABS motor coupler located under the fuel tank is connected properly.
 Check the ABS motor for continuity.  → [D-5]
2. Wire harness (ABS)  Remove the ABS motor coupler and check for c ontinuity between the black terminal of the ABS 
motor coupler of the wire harness (ABS) and the negative battery terminal.
 Remove the ABS ECU coupler and check for continuity between the red/white terminal of the  ABS ECU coupler and the red/white terminal of the ABS...